MANUFACTURING METHOD OF NUCLEAR FUEL ELEMENTS Russian patent published in 2010 - IPC B23K11/02 B23K11/10 B23K31/02 G21C3/10 G21C21/00 

FIELD: power engineering.

SUBSTANCE: invention refers to manufacturing method of nuclear fuel elements and may be used in nuclear power engineering during manufacturing, using contact-butt welding of fuel elements and guide channels of rod type for fuel assemblies of nuclear power reactors. Method includes fixing of end of can (1) of fuel element installed with embedding in welding fixture (2), welding to at least one edge of can (1) of plug (6) by contact-butt welding with its simultaneous displacement inside can (1) on section warmed by welding current, and quality control of welding and stability of process of welded joint sealing. Edge of plug (6) end installed in welding fixture is fixed with respect to edge of welding fixture (2) at a specified position. During plug (6) displacement inside can (1), control of voltage value on section of secondary circuit of welding set, generated by welding fixture with fuel element can end located in it, is performed. Obtained values of voltage are compared to values of voltage specific to conditions of optimum warming of weldments at analogous position of can (1) edge in welding fixture, and according to difference of obtained values quality of welding and stability of sealing process is determined.

EFFECT: improvement of fuel elements quality.

2 cl, 2 dwg, 1 ex